EP 2910320 A1 20150826 - Method for forming hollow parts
Title (en)
Method for forming hollow parts
Title (de)
Verfahren zur Herstellung von Hohlkörpern
Title (fr)
Procédé de formation de pièces creuses
Publication
Application
Priority
EP 14156235 A 20140221
Abstract (en)
A method for forming hollow parts (30) involves the steps of preparing a rod material; treating the rod material with a tube drawing process to form a hollow portion which has an open end, filling liquid into the hollow portion via the open end; sealing the open end with a plug; forging the rod material which has gone through the steps of filling liquid and sealing the open end into a desired shape, the open end being closed during forging process, and the plug being removed from the open end during the forging process; drilling a discharge hole (12) which is in communication with the hollow portion (11) in the rod material obtained from the step of forging, so as to discharge the liquid out of the hollow portion; and obtaining a hollow part (30) after the liquid is discharged from hollow portion via the discharge hole.
IPC 8 full level
B21J 5/02 (2006.01); B21J 5/00 (2006.01); B21K 1/06 (2006.01); B21K 21/00 (2006.01)
CPC (source: EP)
B21K 21/00 (2013.01); B21J 5/00 (2013.01); B21J 5/025 (2013.01); B21K 1/063 (2013.01)
Citation (search report)
- [XI] TW 500679 B 20020901 - SUPERALLOY IND CO LTD [TW]
- [A] TW 555606 B 20031001 - WU CHUEN-BIN [TW]
- [A] TW 201204597 A 20120201 - SUPERALLOY IND CO LTD [TW]
- [A] TW 201242797 A 20121101 - SUPERALLOY IND CO LTD [TW]
- [A] US 2005050986 A1 20050310 - ZENG JIE DONG [TW]
- [A] GB 605555 A 19480727 - GEORGE OSWALD ECCLES, et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 14156235 A 20140221